Bought a Wahl KM2 Speed told it was the top of the line
Every time I use it it ends up working for a few min then gets louder and blades don't align anymore. I've watched all the YouTube videos and they don't help. This is really a piece of junk. There is some design fault in how the blade locks in its far too unstable resulting in constantly mid aligning as you try cut a dogs hair.
Taking it back to the shop I bought it from for a refund and swap to something else.
For a top of the line trimmer its absolute rubbish

I have been grooming for 16years, I started with Km2 and I’m still using km2. I have tried others over the years & they either get too hot are too noisy or are too heavy. I find servicing and maintenance minimal and if they need repair it’s reasonably cheap to fix.

Uh-Oh! wish I'd read reviews before purchasing my clippers last year. Clipped my mini pony like a dream. I cleaned them, oiled them up and packed them away. Got them out yesterday to give her this years "spring clean", they cut for about a minute and then just stopped. I ran through the whole maintenance process again to no avail. I was just about to send them off to get the blades sharpened, when I came across this page :( Now I have a very expensive piece of stable art that is totally useless for purpose and from all accounts there's no point in contacting wahl. Very disappointing and I feel so stupid for not checking review site before purchasing as I usually do!

Paid over $250 for these clippers 12 months ago, after I found my Oster A 5 was getting a bit hot. Like others on here they worked fine for about the first 4 or 5 times then they just drag on the fur. I bath my dog before grooming so dirt is not the issue, even using a new blade made no difference. I have now bought an A6 Oster, but trying to sell the Whal is a up hill battle so there must be lots more people out there who have found the same problem with these clippers.

Cost $240-00 including a Whal special blade lubricating oil, opened box when getting home only to find out there were no different thickness clipper guides supplied.
The salesperson asked what type of dog I wanted to groom, however there was no advice that further accessories would be required to undertake task.
I previously purchased a Whal professional clipper a few years back and have had a satisfying run out of it, hence I stayed with this brand, however I am not very impressed by the lack of accessories supplied in the box and will change brands in future purchasing.

As a dog groomer i use these all the time i have NO issue with them. They donot cut out or stop during use. They only time i find they dont work is when the clipper blades are blunt or the dogs are filthy and the dirt clogs them up.. i can use 1 blade upto 6 dogs a day.. with no problem at all.. and i would recommend these clippers..

For the first 5 clips they worked fine, now they just pull the fur and don't cut...I thought they might have been out of alignment but I have checked and re-checked (and re-checked again) and the alignment is perfect.I use lots of oil so I don't expect that they have become too blunt to use after 5 clips (of a small shitsu). I am not sure what to do as I have lost the receipt and payed nearly $300 for them! Very unhappy.

I have had these clippers for 2.5 years now that we use on our himalayan cat. As we live in Queensland. Nov - March we cut her hair every 6 weeks. As long as there is no mats in her coat it's like sheering a sheep :) Very easy to use.

I only use the slow speed and i haven't seen the need to use the higher speed. The blades warm up if using the high speed for long periods.

These clippers are so gentle that I even use them on my face to clip my beard.

I paid a fortune for what was supposed to be trusted brand! Ha! They worked fine the first time, the second use I turned them off and put them down to grab a better hold of the dog, and they never came back on! As for the company, I have emailed them repeatedly to ask about authorised repairers, and they can't even give their customers the time of day. Stay away from Wahl if you value your money!

My km2 clippers worked great for the first 4 cuts now they seem to stop cutting and only pulls my dogs fur out and doesn't glide through the fur. Tried to get it fixed but still happening. Not happy as they cost me nearly $300.
About to buy some new clippers, preferably not wahl.

These WERE great clippers, I actually wrote a raving review... However, the KM2 sporadically stops cutting. This is not a blunt blade issue, but seems to be a major problem with these clippers (searching "KM2 blade stops cutting" brings up dozens of threads). I have written to Wahl to see what can be done, and I haven't received any reply (also a common issue apparently). So no, I wouldn't recommend these clippers, they are not reliable and their customer service seems to be nonexistent.

We bought these clippers a few months ago for our Lhasa Apso. They are quick to use, and give an even trim. They are quiet and cool enough to keep our pooch relaxed from start to end. We wish we had bought these years ago - her fur grows so quickly that in hot weather she needs frequent trims . That used to be such a time-consuming tasks with scissors. Not any more. We bought a kit that included a set of combs. Would recommend this.
Quiet, cool, fast with great finish.

I have bought many clippers over the years, but the Wahl KM-2 is awesome. It cuts through anything. I also bought a set of comb guides for it, which is a must for pets. My previous clippers was also a Wahl, but it was a salon hair clipper unit that could not cut my Spaniels coat. I am very happy with the KM-2. Cuts through any coat even on the lowest speed.
quality, reliability, rotary gearing is less noisy and does not buzz. 45W of power. Cooling fan.
cooling exhaust is located at the bottom of unit, where your fingers can easily block it

Only used it the once, but worked a charm. Oiled it regularly during use as per the instructions and it completed the job with ease. The extra cost for the better model is worth every cent. Easy to change blades is a bonus and good to know I can source a replacement blade easily and without costing a fortune.
Cuts brilliantly.
Nothing

I purchased the KM-2 for my mobile grooming business many years ago, and they clipped away without missing a beat every day. I no longer have the business but the clippers are still going strong. Many groomers need two clipper handsets because others heat up so much they burn your hand and the dog, but not these. They get warm at most, and just keep clipping away faithfully. I used an alternate brand of blades on them, and love the fact these clippers allow for that, as Wahl blades are pretty pricey.
The cord is of reasonable length, and mine came with a little storage tool box which has kept them safe.
Everything! Run cooler than competitors, haven't missed a beat.